From f3d75ec360beca15191bbfb9ce8ba8fea9397d68 Mon Sep 17 00:00:00 2001
From: Petr Baudis <pasky@ucw.cz>
Date: Thu, 8 Oct 2009 13:17:38 +0200
Subject: [PATCH] Stats: Introduce stats_update_value() to recompute the value

---
 stats.h    | 10 ++++++++++
 uct/tree.h |  3 +--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/stats.h b/stats.h
index cde3695..e0a57f9 100644
--- a/stats.h
+++ b/stats.h
@@ -9,4 +9,14 @@ struct move_stats {
 	float value; // wins/playouts
 };
 
+/* Recompute value based on wins/playouts. */
+static void stats_update_value(struct move_stats *s);
+
+
+static inline void
+stats_update_value(struct move_stats *s)
+{
+	s->value = (float) s->wins / s->playouts;
+}
+
 #endif
diff --git a/uct/tree.h b/uct/tree.h
index 398839d..9234484 100644
--- a/uct/tree.h
+++ b/uct/tree.h
@@ -78,8 +78,7 @@ static bool tree_leaf_node(struct tree_node *node);
 	(tree_parity(tree, parity) > 0 ? node->type.wins : node->type.playouts - node->type.wins)
 
 /* Recompute the value. */
-#define tree_node_update_value(node, type) \
-	((node)->type.value = (float)(node)->type.wins / (node)->type.playouts)
+#define tree_node_update_value(node, type) stats_update_value(&(node)->type)
 
 static inline bool
 tree_leaf_node(struct tree_node *node)
-- 
2.11.4.GIT